Show team and repo badges on README
Show team and repo badges on README

This patch adds the team's and repository's badges to the README file.
The motivation behind this is to communicate the project status and
features at first glance.

For more information about this effort, please read this email thread:

http://lists.openstack.org/pipermail/openstack-dev/2016-October/105562.html

To see an example of how this would look like check:

https://gist.github.com/241e2ef4630b9a285c84f4fb7a6164af

Change-Id: I579d80209c9e56e2e90b53b1d23bf797b4d4a0fa

openstack/vitrage,openstack/vitrage,openstack/vitrage